When operating a self-pressurizing liquid nitrogen tank,you need to follow the prescribed steps,otherwise danger may occur.
The specific operations are as follows:
1.Close the vent valve first to prevent the new pressure from being released;
2.Open the boosting valve and activate the boosting system, and the pressure in the tank will gradually increase;
3.Observe the pressure gauge and see the inner tank pressure data;
4.If the pressure gauge indicates ≥0.05MPa,the inlet and outlet valves can be opened to release liquid nitrogen; otherwise,the pressure gauge indicates <0.05MPa,indicating that the pressure is not enough and needs to continue to be pressurized.
Note:There is a limit to the boost pressure,which cannot be close to 0.09MPa!
When the liquid nitrogen delivery is completed,close the boosting valve, the inlet and outlet valves,and open the vent valve in sequence; first stop the boosting,then stop the infusion, and then release the pressure and residual liquid.